package net.helix.ui;

// TODO: make a custom version of this class. Only using code from the 
// Oracle's site documentation for filler purposes...
// X button needs to make a popup: "Save changes to my_project?"

/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
*   - Redistributions of source code must retain the above copyright
*     notice, this list of conditions and the following disclaimer.
*
*   - Redistributions in binary form must reproduce the above copyright
*     notice, this list of conditions and the following disclaimer in the
*     documentation and/or other materials provided with the distribution.
*
*   - Neither the name of Oracle or the names of its
*     contributors may be used to endorse or promote products derived
*     from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/ 

import javax.swing.*;
import javax.swing.*;
import javax.swing.plaf.basic.BasicButtonUI;
import java.awt.*;
import java.awt.event.*;

/**
* Component to be used as tabComponent;
* Contains a JLabel to show the text and 
* a JButton to close the tab it belongs to 
*/ 
public class ButtonTabComponent extends JPanel {
   private final JTabbedPane pane;

   public ButtonTabComponent(final JTabbedPane pane) {
       //unset default FlowLayout' gaps
       super(new FlowLayout(FlowLayout.LEFT, 0, 0));
       if (pane == null) {
           throw new NullPointerException("TabbedPane is null");
       }
       this.pane = pane;
       setOpaque(false);
       
       //make JLabel read titles from JTabbedPane
       JLabel label = new JLabel() {
           public String getText() {
               int i = pane.indexOfTabComponent(ButtonTabComponent.this);
               if (i != -1) {
                   return pane.getTitleAt(i);
               }
               return null;
           }
       };
       
       add(label);
       //add more space between the label and the button
       label.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 5));
       //tab button
       JButton button = new TabButton();
       add(button);
       //add more space to the top of the component
       setBorder(BorderFactory.createEmptyBorder(2, 0, 0, 0));
   }

   private class TabButton extends JButton implements ActionListener {
       public TabButton() {
           int size = 17;
           setPreferredSize(new Dimension(size, size));
           setToolTipText("close this tab");
           //Make the button looks the same for all Laf's
           setUI(new BasicButtonUI());
           //Make it transparent
           setContentAreaFilled(false);
           //No need to be focusable
           setFocusable(false);
           setBorder(BorderFactory.createEtchedBorder());
           setBorderPainted(false);
           //Making nice rollover effect
           //we use the same listener for all buttons
           addMouseListener(buttonMouseListener);
           setRolloverEnabled(true);
           //Close the proper tab by clicking the button
           addActionListener(this);
       }

       public void actionPerformed(ActionEvent e) {
           int i = pane.indexOfTabComponent(ButtonTabComponent.this);
           if (i != -1) {
               pane.remove(i);
           }
       }

       //we don't want to update UI for this button
       public void updateUI() {
       }

       //paint the cross
       protected void paintComponent(Graphics g) {
           super.paintComponent(g);
           Graphics2D g2 = (Graphics2D) g.create();
           //shift the image for pressed buttons
           if (getModel().isPressed()) {
               g2.translate(1, 1);
           }
           g2.setStroke(new BasicStroke(2));
           g2.setColor(Color.BLACK);
           if (getModel().isRollover()) {
               g2.setColor(Color.MAGENTA);
           }
           int delta = 6;
           g2.drawLine(delta, delta, getWidth() - delta - 1, getHeight() - delta - 1);
           g2.drawLine(getWidth() - delta - 1, delta, delta, getHeight() - delta - 1);
           g2.dispose();
       }
   }

   private final static MouseListener buttonMouseListener = new MouseAdapter() {
       public void mouseEntered(MouseEvent e) {
           Component component = e.getComponent();
           if (component instanceof AbstractButton) {
               AbstractButton button = (AbstractButton) component;
               button.setBorderPainted(true);
           }
       }

       public void mouseExited(MouseEvent e) {
           Component component = e.getComponent();
           if (component instanceof AbstractButton) {
               AbstractButton button = (AbstractButton) component;
               button.setBorderPainted(false);
           }
       }
   };
}

